i took this about a few weeks ago.. so i might not know exactly... if i recalled correctly there was a container in the sink which was half washed... meaning there was soap in it but it wasnt washed yet. so i added in water and hence soap suds were produced. i got my camera to 1/250 F5-8(not sure) and switched on flash. i used a Powershot G2 i borrowed from my school.
i toyed around it with photoshop to give the border and changed the color..